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Home >> Cadillac >> 1969 >> Calais Not Available, Automatic Trans >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Automatic Temperature Control >> Control System Components & Functions >> Vacuum Check Valve

Vacuum Check Valve

Provides full engine vacuum to the temperature control vacuum tank and the park brake release actuator, and checked vacuum to the temperature control function circuit. The valve is located on, the blower and evaporator case in the engine compartment.